39 research outputs found
Cryogenic Characterization of FBK HD Near-UV Sensitive SiPMs
We report on the characterization of near-ultraviolet high density silicon
photomultiplier (\SiPM) developed at Fondazione Bruno Kessler (\FBK) at
cryogenic temperature. A dedicated setup was built to measure the primary dark
noise and correlated noise of the \SiPMs\ between 40 and 300~K. Moreover, an
analysis program and data acquisition system were developed to allow the
precise characterization of these parameters, some of which can vary up to 7
orders of magnitude between room temperature and 40~K. We demonstrate that it
is possible to operate the \FBK\ near-ultraviolet high density \SiPMs\ at
temperatures lower than 100~K with a dark rate below 0.01 cps/mm and total
correlated noise probability below 35\% at an over-voltage of 6~V. These
results are relevant for the development of future cryogenic particle detectors
using \SiPMs\ as photosensors
Cryogenic SiPM arrays for the DUNE photon detection system
In this paper we report on the characterization of SiPM tiles developed for
the R & D on the DUNE Photon Detection System. The tiles were produced by
Fondazione Bruno Kessler (FBK) employing NUV-HD-SF SiPMs. Special emphasis is
given on cryo-reliability of the sensors, i.e. the stability of electric and
mechanical properties after thermal cycles at room and 77K temperature. The
characterization includes the determination of the I-V curve, a high
sensitivity measurement of Dark Count Rate at different overvoltages, and
correlated noise. The single p.e. sensitivity is measured as a function of the
number of sensors connected to a single electronic channel, after amplification
at 77K using a dedicated cold amplifier.Comment: 17 pages, 10 figures, 4 table, submitted to NIM-
NUV-HD SiPMs with metal-filled trenches
In this paper we present the performance of a new SiPM that is sensitive to blue light and features narrow metal-filled trenches placed in the area around the single-photon avalanche diodes (SPADs) that allow an almost complete suppression the internal optical crosstalk. In particular, we show the benefits of this technological upgrade in terms of electro-optical SiPM performance when compared to the previous technology which had only a partial optical screening between the SPADs. The most relevant effect is the much higher bias voltage that can be applied to the new device before the noise diverges. This allows to optimize and improve both the photon detection efficiency and the single-photon time resolution. We also coupled the SiPMs to LYSO scintillators to verify the performance for possible application in Positron-Emission Tomography. Thanks to the better electro-optical features we were able to measure an improved coincidence time resolution. Furthermore, the optimal voltage operation region is substantially larger, making this SiPM more suitable for real system application where thousands of channels have to provide stable and reproducible performance
Comparative investigation of silicon photomultipliers as possible photon detectors for the Cherenkov Telescope Array
One of most interesting improvements in CTA observatory will be the use of silicon photomultipliers (SiPMs) as pho-
ton detectors for the telescope cameras. SiPMs have many key advantages compared with photomultiplier tubes, however they have also some drawbacks, such as dark noise, cross-talk and afterpulses. Moreover several companies produce a multitude of different types of SiPMs, since they stand as a very promising technology to replace photomultiplier tube in many applications.
A comparative investigation of SiPMs\u2019 properties using a semi-automated test setup is therefore a powerful instrument to identify the best device for CTA telescope cameras
Design considerations for a new generation of SiPMs with unprecedented timing resolution
The potential of photon detectors to achieve precise timing information is of
increasing importance in many domains, PET and CT scanners in medical imaging
and particle physics detectors, amongst others. The goal to increase by an
order of magnitude the sensitivity of PET scanners and to deliver, via
time-of-flight (TOF), true space points for each event, as well as the
constraints set by future particle accelerators require a further leap in time
resolution of scintillator-based ionizing radiation detectors, reaching
eventually a few picoseconds resolution for sub MeV energy deposits. In spite
of the impressive progress made in the last decade by several manufacturers,
the Single Photon Time Resolution (SPTR) of SiPMs is still in the range of
70-120ps FWHM, whereas a value of 10ps or even less would be desirable. Such a
step requires a break with traditional methods and the development of novel
technologies. The possibility of combining the extraordinary potential of
nanophotonics with new approaches offered by modern microelectronics and 3D
electronic integration opens novel perspectives for the development of a new
generation of metamaterial-based SiPMs with unprecedented photodetection
efficiency and timing resolution.Comment: 16 pages, 6 figures, submitted to JINS
Challenges for dark matter direct search with SiPMs
Liquid xenon and liquid argon detectors are leading the direct dark matter search and are expected to be the candidate technology for the forthcoming generation of ultra-sensitive large-mass detectors. At present, scintillation light detection in those experiments is based on ultra-pure low-noise photo-multipliers. To overcome the issues in terms of the extreme radio-purity, costs, and technological feasibility of the future dark matter experiments, the novel silicon photomultiplier (SiPM)-based photodetector modules seem to be promising candidates, capable of replacing the present light detection technology. However, the intrinsic features of SiPMs may limit the present expectations. In particular, interfering phenomena, especially related to the optical correlated noise, can degrade the energy and pulse shape resolutions. As a consequence, the projected sensitivity of the future detectors has to be reconsidered accordingly
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Cryogenic Characterization of FBK RGB-HD SiPMs
We report on the cryogenic characterization of Red Green Blue - High Density
(RGB-HD) SiPMs developed at Fondazione Bruno Kessler (FBK) as part of the
DarkSide program of dark matter searches with liquid argon time projection
chambers. A dedicated setup was used to measure the primary dark noise, the
correlated noise, and the gain of the SiPMs at varying temperatures. A
custom-made data acquisition system and analysis software were used to
precisely characterize these parameters. We demonstrate that FBK RGB-HD SiPMs
with low quenching resistance (RGB-HD-LR) can be operated from 40 K to 300
K with gains in the range to and noise rates on the order of a
few Hz/mm
Technical and scientific performance of the prototype Schwarzschild-Couder telescope for CTA
The Cherenkov Telescope Array (CTA) is the next-generation ground-based observatory for very-high-energy gamma rays. One candidate design for CTA's medium-sized telescopes consists of the Schwarzschild-Couder Telescope (SCT), featuring innovative dual-mirror optics. The SCT project has built and is currently operating a 9.7-m prototype SCT (pSCT) at the Fred Lawrence Whipple Observatory (FLWO); such optical design enables the use of a compact camera with state-of-the art silicon photomultiplier detectors. A partially-equipped camera has recently successfully detected the Crab Nebula with a statistical significance of 8.6 standard deviations. A funded upgrade of the pSCT focal plane sensors and electronics is currently ongoing, which will bring the total number of channels from 1600 to 11328 and the telescope field of view from about 2.7° to 8° . In this work, we will describe the technical and scientific performance of the pSCT